Shelf



FIG. 1 is a front perspective view of shelf, showing my new design;

FIG. 2 is a rear isometric view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is a partial enlarged view of the portion labeled “9” in FIG. 1;

FIG. 10 is an enlarged view of FIG. 5; and,

FIG. 11 is an enlarged view of FIG. 6.

The broken lines consisting of a long dash and a short dash depict reference to the enlargements shown in the figures and form no part of the claim. 

CLAIM The ornamental design for shelf, as shown and described. 